Vent structure for furnaces



juiy 8v 192%. 1,500,505

G. F. LENK VENT STRUCTURE FOR FURNACES Filed Sept. 29, 1923 2Sheets-Sheet l Jul 8 1924. 1,500,505

G. F. LENK VENT STRUCTURE FOR FURNACES Filed Sept. 29 192-3 2Sheets-Sheet 2 naces.

Patented July 8, 19.24.

ens RLE'NK, or nAL nA's, TEXAS.

-VE1\TT STRUCTURE FOR FURNACES.

Application filed September 29, 1923.- S'e-rial No. 665,616.

To all whom/it may concern Be it known that 1, Gus F. LENK, citizen oftheUnited States of America, residing at Dallas, in the county of Dallasand State of Texas, have invented certain new and useful Improvements inVent- Structures for Furnaces, of which the following i is aspecification.

This invention relates to new and useful improvements in vent structuresfor fur- In the operation of furnaces it is desired to conserve the heatand prevent as much as is possible, its dissipation by radiation and tothis end insulation is inserted in the furnace walls. While this iseffective,

the temperature around the furnace is usually 'exceedingly high,according to the intensity of the fire. The object of my invention is tovent the furnace walls by includinga space over the "fire archandcirculating airthrough said space.

A further object is to reduce thetemperature around the furnace bycarrying off -the hot air through a vent opening in thefurnace*walhthrough which vent outside air is drawn.

Another object is todischarge the circulatory air into the smoke stack.independently of the furnace gasesywhereby circulation is 1 promoted.

Aparticular object of the invention is to cool the working floor abovethe arch and also to'cool themetal charging hoppers.

An advantage of the invention is that by I utilizing the vertical fiuepassage andtaking in the air from the furnace all the advan E tages ofan 'artificial mechanical suction sys- 118111 arehadwithout the expenseof installation or operation thereof.

A construction designed to carry'outthe invention will be hereinafterdescribed together with other features of the invention.

' The invention will be more readily understood from-a reading of thefollowing specificationand by reference to the accompanying drawings, inwhich an example of the in vention is shownyand wherein: V

Fig. 1 is a transverse" sectional View of a furnace constructed inaccordance with my invention,

Fig. 2 is a longitudinal sectional view of the same, and

Fig. 3 is a plan view, the roof being broken away to show the airchambers.

burning chamber.

center of the burning chamber. the baffle wall and the side wall 14consump- In the drawings the numeral 10 designates the base or bottom ofan incinerator or furnace. A front wall 11 and a back wall 12 e-xtendupwardly and are connected byside walls 13 and'll respectively, all ofwhich extend upwardly from the base. The

tion grates 20 are provided. 1 Ash pits 18 and 20 are provided under thegrates 18 and 20 respectively.

In the lower forward portion of the burning chamber an arched opening 21is provided, contiguous to the surface of the ad- JtLCGIlt grate 20. Thedetails of the burning chamber are not considered essential as the sameissubject to considerable variation, however the side escape of theproducts of combustio-ns or gases over the grates is important.

Contiguous to the side wall 14 is built airauxiliary combustion. chamberformed by -a floor 22 an outer wall 28, a front wall 11,

a rear wall 12 and an arch 24-. The coin- "bustionchamber is of courselined with re fractory material. In'the wall 12 is formed a verticalopening orflue entrance 25 which is considerablyles's in width than thechamher and has its upper end some distance below the arch 24.

The arch 15 is covered on its upper side with a layer 26 of suitableinsulating niaterial and the arcli 2 1 likewise has a similar "covering27. Between the coverings and the roof or floor 17 is an air chamber 28.It is pointed out that this air chamber extends over the entire interiorof the furnace.

In the right handend (Fig. 3) of the front wall 11 and above the burningchamber I provide an air adinittingduct 29 and a similar duct 30 isprovided in the front wall 11, which'latter is in fact a continuationand part of the front wall 11. Air is admitted to the air chamber bythese two ducts, and after circulating therein passes which areimmediately under the floor, the

hot air from in front of the incinerator is carried off and acirculation set up which promotes a lower temperature around thefurnace. The air passing through the chamber 28 will keep the floor 17cool and carry off the excess heat therefrom. This circulation will alsocool the hopper lining 16 of the charging holes. An incinerator equippedwith this air chamber will have a longer life and function moresatisfactorily. It is obvious that the vertical passage 33 in the stackwill cause a good circulation through the chamber 28.

Various changes in the arrangement and structure of the differentelements as well as modifications and alterations, may be made withinthe scope of the appended claims.

W hat I claim is:

1. In a furnace, the combination with a burning chamber having a firearch covering its top, a floor above the arch, and a stack having acentral smoke conduit, of an air chamber extending over the arch betweenthe chamber and the floor, said chamber having an air admitting openingin one end and an outlet at the opposite end free from connection withthe conduit of the stack. I i

2. In a furnace, the combination with a burning chamber having a firearch covering its top, a combustion chamber connecting with the burningchamber and having an arch covering its top, of a floor above thearches, air admitting ducts for the chamber above each arch, a verticalair passage in the stack of the furnace separate from the smoke conduitthereof and ducts contiguous to the arches leading into said passage.

3. In a furnace, the combination of a burning chamber, having a firearch at its top, a combustion chamber having an arch at its top, a stackconnected with the com bustion chamber and having a vertical smokeconduit, and a floor above the arches, an air chamber extending over theentire interior of the furnace between the arches and the floor andhaving an air admitting opening at one end and an air outlet at itsopposite end, said outlet being free from connection with the conduit ofthe stack.

4. In a furnace, the combination of a burning chamber, having a firearch at its top, a combustion chamber having an arch' at its top, astack connected with the combustion chamber having a vertical smokeconduit, a floor above the arches, an air chamber extending over theentire interlor of the furnace between the arches and the floor andhaving an air admitting opening at one end and an air outlet at itsopposite end, and a vertical air passage in the stack separate from theconduit with which the chamber outlet connects.

5. In a furnace, the combination of a burning chamber having a frontwall and an arch at its top, a stack having a vertical smoke conduit,and a floor above the arch, an air chamber between the arch and thefloor, an air admitting duct in the front wall above the arch leading tothe chamber, a vertical air passage in the stack separate from theconduit, and an air outlet duct leading from the chamber to the airpassage of the stack.

6. In a furnace, the combination of a burning chamber having a frontwall and an arch at its top, a combustion chamber having a front walland an arch at its top,

a floor spaced above the arches, a stack con-V nected with'thecombustion chamber and having a smoke conduit, an air chamber extendinghorizontally between the arches and the floor, an air admitting duct inthe front wall of the burning chamber between the arch and the floor, asecond air admitting duct in the front wall of the combustion chamberbetween the arch thereof and the floor, both of said ducts leading tothe air chamber, a pair of air outlet ducts leading through the sides ofthe stack from the air chamber, and a vertical air passage in the stackseparate from the conduit into which said outlet ducts discharge.

7. In a furnace having a burning chamber with an air chamber above andseparate from the burning chamber and a floor above the air chamber,said air chamber having an air inlet immediately under the floor and anoutlet for creating a draft through the air chamber.

8. In a furnace having a burning chamber with an air chamber above andseparate from the burning chamber, a floor above the air chamber, and astack having a smoke conduit connected with the burning chamber, the airchamber having an air inlet at one side and an air outlet at the otherside and being free from connection withthe burning chamber or'the smokeconduit of the stack. 7

In testimony whereof I affix my signature.

en s F. LjENK.

